We have 2 ISPConfig3 servers running ... both have been maintained identically so the patches, plugins, everything should be the same ... we've been using squirrelmail for some time and it has always worked ... now one of the servers (not both) is getting an error when users try to log in:
You must be logged in to access this page.
Trying to troubleshoot this and we can seem to find any logs or anything that relate to why this is happening. One the SquirrelMail page it has this error message and possible solutions at http://squirrelmail.org/wiki/LoginError
... but php seems fine and cookies don't appear to be the issue.
Just wondering if anyone else has had this problem and resolved it yet?